Cohere SDK Patterns

Quick Guide: Use the cohere-ai npm package with CohereClientV2 for all new Cohere integrations. V2 API requires model on every call. Use chatStream for streaming with content-delta events. Embeddings require inputType matching your use case (search_document for indexing, search_query for querying). Rerank scores documents by relevance. RAG works by passing documents to chat() -- the model returns inline citations automatically. Tool use follows a 4-step loop: user message, model returns tool_calls, you execute and return results, model generates cited response.

<critical_requirements>

CRITICAL: Before Using This Skill

All code must follow project conventions in CLAUDE.md (kebab-case, named exports, import ordering, import type, named constants)

(You MUST use CohereClientV2 (not CohereClient) for all new code -- V2 is the current API with required model parameter)

(You MUST specify inputType on every embed call -- search_document for indexing, search_query for querying -- mismatched types produce garbage similarity scores)

(You MUST handle the tool use loop correctly: append the full assistant message (with tool_calls) to messages, then append tool role results with matching tool_call_id)

(You MUST check finish_reason in responses -- MAX_TOKENS means the output was truncated)